/*! Socket.IO.js build:0.8.7, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed */

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, global) {

    /**
   * IO namespace.
   *
   * @namespace
   */

    var io = exports;

    /**
   * Socket.IO version
   *
   * @api public
   */

    io.version = '0.8.7';

    /**
   * Protocol implemented.
   *
   * @api public
   */

    io.protocol = 1;

    /**
   * Available transports, these will be populated with the available transports
   *
   * @api public
   */

    io.transports = [];

    /**
   * Keep track of jsonp callbacks.
   *
   * @api private
   */

    io.j = [];

    /**
   * Keep track of our io.Sockets
   *
   * @api private
   */
    io.sockets = {};


    /**
   * Manages connections to hosts.
   *
   * @param {String} uri
   * @Param {Boolean} force creation of new socket (defaults to false)
   * @api public
   */

    io.connect = function (host, details) {
        var uri = io.util.parseUri(host)
        , uuri
        , socket;

        if (global && global.location) {
            uri.protocol = uri.protocol || global.location.protocol.slice(0, -1);
            uri.host = uri.host || (global.document
                ? global.document.domain : global.location.hostname);
            uri.port = uri.port || global.location.port;
        }

        uuri = io.util.uniqueUri(uri);

        var options = {
            host: uri.host
            , 
            secure: 'https' == uri.protocol
            , 
            port: uri.port || ('https' == uri.protocol ? 443 : 80)
            , 
            query: uri.query || ''
        };

        io.util.merge(options, details);

        if (options['force new connection'] || !io.sockets[uuri]) {
            socket = new io.Socket(options);
        }

        if (!options['force new connection'] && socket) {
            io.sockets[uuri] = socket;
        }

        socket = socket || io.sockets[uuri];

        // if path is different from '' or /
        return socket.of(uri.path.length > 1 ? uri.path : '');
    };

})('object' === typeof module ? module.exports : (this.io = {}), this);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, global) {

    /**
   * Utilities namespace.
   *
   * @namespace
   */

    var util = exports.util = {};

    /**
   * Parses an URI
   *
   * @author Steven Levithan <stevenlevithan.com> (MIT license)
   * @api public
   */

    var re = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

    var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password',
    'host', 'port', 'relative', 'path', 'directory', 'file', 'query',
    'anchor'];

    util.parseUri = function (str) {
        var m = re.exec(str || '')
        , uri = {}
        , i = 14;

        while (i--) {
            uri[parts[i]] = m[i] || '';
        }

        return uri;
    };

    /**
   * Produces a unique url that identifies a Socket.IO connection.
   *
   * @param {Object} uri
   * @api public
   */

    util.uniqueUri = function (uri) {
        var protocol = uri.protocol
        , host = uri.host
        , port = uri.port;

        if ('document' in global) {
            host = host || document.domain;
            port = port || (protocol == 'https'
                && document.location.protocol !== 'https:' ? 443 : document.location.port);
        } else {
            host = host || 'localhost';

            if (!port && protocol == 'https') {
                port = 443;
            }
        }

        return (protocol || 'http') + '://' + host + ':' + (port || 80);
    };

    /**
   * Mergest 2 query strings in to once unique query string
   *
   * @param {String} base
   * @param {String} addition
   * @api public
   */

    util.query = function (base, addition) {
        var query = util.chunkQuery(base || '')
        , components = [];

        util.merge(query, util.chunkQuery(addition || ''));
        for (var part in query) {
            if (query.hasOwnProperty(part)) {
                components.push(part + '=' + query[part]);
            }
        }

        return components.length ? '?' + components.join('&') : '';
    };

    /**
   * Transforms a querystring in to an object
   *
   * @param {String} qs
   * @api public
   */

    util.chunkQuery = function (qs) {
        var query = {}
        , params = qs.split('&')
        , i = 0
        , l = params.length
        , kv;

        for (; i < l; ++i) {
            kv = params[i].split('=');
            if (kv[0]) {
                query[kv[0]] = decodeURIComponent(kv[1]);
            }
        }

        return query;
    };

    /**
   * Executes the given function when the page is loaded.
   *
   *     io.util.load(function () { console.log('page loaded'); });
   *
   * @param {Function} fn
   * @api public
   */

    var pageLoaded = false;

    util.load = function (fn) {
        if ('document' in global && document.readyState === 'complete' || pageLoaded) {
            return fn();
        }

        util.on(global, 'load', fn, false);
    };

    /**
   * Adds an event.
   *
   * @api private
   */

    util.on = function (element, event, fn, capture) {
        if (element.attachEvent) {
            element.attachEvent('on' + event, fn);
        } else if (element.addEventListener) {
            element.addEventListener(event, fn, capture);
        }
    };

    /**
   * Generates the correct `XMLHttpRequest` for regular and cross domain requests.
   *
   * @param {Boolean} [xdomain] Create a request that can be used cross domain.
   * @returns {XMLHttpRequest|false} If we can create a XMLHttpRequest.
   * @api private
   */

    util.request = function (xdomain) {

        if (xdomain && 'undefined' != typeof XDomainRequest) {
            return new XDomainRequest();
        }

        if ('undefined' != typeof XMLHttpRequest && (!xdomain || util.ua.hasCORS)) {
            return new XMLHttpRequest();
        }

        if (!xdomain) {
            try {
                return new ActiveXObject('Microsoft.XMLHTTP');
            } catch(e) { }
        }

        return null;
    };

    /**
   * XHR based transport constructor.
   *
   * @constructor
   * @api public
   */

    /**
   * Change the internal pageLoaded value.
   */

    if ('undefined' != typeof window) {
        util.load(function () {
            pageLoaded = true;
        });
    }

    /**
   * Defers a function to ensure a spinner is not displayed by the browser
   *
   * @param {Function} fn
   * @api public
   */

    util.defer = function (fn) {
        if (!util.ua.webkit || 'undefined' != typeof importScripts) {
            return fn();
        }

        util.load(function () {
            setTimeout(fn, 100);
        });
    };

    /**
   * Merges two objects.
   *
   * @api public
   */
  
    util.merge = function merge (target, additional, deep, lastseen) {
        var seen = lastseen || []
        , depth = typeof deep == 'undefined' ? 2 : deep
        , prop;

        for (prop in additional) {
            if (additional.hasOwnProperty(prop) && util.indexOf(seen, prop) < 0) {
                if (typeof target[prop] !== 'object' || !depth) {
                    target[prop] = additional[prop];
                    seen.push(additional[prop]);
                } else {
                    util.merge(target[prop], additional[prop], depth - 1, seen);
                }
            }
        }

        return target;
    };

    /**
   * Merges prototypes from objects
   *
   * @api public
   */
  
    util.mixin = function (ctor, ctor2) {
        util.merge(ctor.prototype, ctor2.prototype);
    };

    /**
   * Shortcut for prototypical and static inheritance.
   *
   * @api private
   */

    util.inherit = function (ctor, ctor2) {
        function f() {};
        f.prototype = ctor2.prototype;
        ctor.prototype = new f;
    };

    /**
   * Checks if the given object is an Array.
   *
   *     io.util.isArray([]); // true
   *     io.util.isArray({}); // false
   *
   * @param Object obj
   * @api public
   */

    util.isArray = Array.isArray || function (obj) {
        return Object.prototype.toString.call(obj) === '[object Array]';
    };

    /**
   * Intersects values of two arrays into a third
   *
   * @api public
   */

    util.intersect = function (arr, arr2) {
        var ret = []
        , longest = arr.length > arr2.length ? arr : arr2
        , shortest = arr.length > arr2.length ? arr2 : arr;

        for (var i = 0, l = shortest.length; i < l; i++) {
            if (~util.indexOf(longest, shortest[i]))
                ret.push(shortest[i]);
        }

        return ret;
    }

    /**
   * Array indexOf compatibility.
   *
   * @see bit.ly/a5Dxa2
   * @api public
   */

    util.indexOf = function (arr, o, i) {
        if (Array.prototype.indexOf) {
            return Array.prototype.indexOf.call(arr, o, i);
        }

        for (var j = arr.length, i = i < 0 ? i + j < 0 ? 0 : i + j : i || 0; 
            i < j && arr[i] !== o; i++) {}

        return j <= i ? -1 : i;
    };

    /**
   * Converts enumerables to array.
   *
   * @api public
   */

    util.toArray = function (enu) {
        var arr = [];

        for (var i = 0, l = enu.length; i < l; i++)
            arr.push(enu[i]);

        return arr;
    };

    /**
   * UA / engines detection namespace.
   *
   * @namespace
   */

    util.ua = {};

    /**
   * Whether the UA supports CORS for XHR.
   *
   * @api public
   */

    util.ua.hasCORS = 'undefined' != typeof XMLHttpRequest && (function () {
        try {
            var a = new XMLHttpRequest();
        } catch (e) {
            return false;
        }

        return a.withCredentials != undefined;
    })();

    /**
   * Detect webkit.
   *
   * @api public
   */

    util.ua.webkit = 'undefined' != typeof navigator
    && /webkit/i.test(navigator.userAgent);

})('undefined' != typeof io ? io : module.exports, this);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

    /**
   * Expose constructor.
   */

    exports.EventEmitter = EventEmitter;

    /**
   * Event emitter constructor.
   *
   * @api public.
   */

    function EventEmitter () {};

    /**
   * Adds a listener
   *
   * @api public
   */

    EventEmitter.prototype.on = function (name, fn) {
        if (!this.$events) {
            this.$events = {};
        }

        if (!this.$events[name]) {
            this.$events[name] = fn;
        } else if (io.util.isArray(this.$events[name])) {
            this.$events[name].push(fn);
        } else {
            this.$events[name] = [this.$events[name], fn];
        }

        return this;
    };

    EventEmitter.prototype.addListener = EventEmitter.prototype.on;

    /**
   * Adds a volatile listener.
   *
   * @api public
   */

    EventEmitter.prototype.once = function (name, fn) {
        var self = this;

        function on () {
            self.removeListener(name, on);
            fn.apply(this, arguments);
        };

        on.listener = fn;
        this.on(name, on);

        return this;
    };

    /**
   * Removes a listener.
   *
   * @api public
   */

    EventEmitter.prototype.removeListener = function (name, fn) {
        if (this.$events && this.$events[name]) {
            var list = this.$events[name];

            if (io.util.isArray(list)) {
                var pos = -1;

                for (var i = 0, l = list.length; i < l; i++) {
                    if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
                        pos = i;
                        break;
                    }
                }

                if (pos < 0) {
                    return this;
                }

                list.splice(pos, 1);

                if (!list.length) {
                    delete this.$events[name];
                }
            } else if (list === fn || (list.listener && list.listener === fn)) {
                delete this.$events[name];
            }
        }

        return this;
    };

    /**
   * Removes all listeners for an event.
   *
   * @api public
   */

    EventEmitter.prototype.removeAllListeners = function (name) {
        // TODO: enable this when node 0.5 is stable
        //if (name === undefined) {
        //this.$events = {};
        //return this;
        //}

        if (this.$events && this.$events[name]) {
            this.$events[name] = null;
        }

        return this;
    };

    /**
   * Gets all listeners for a certain event.
   *
   * @api publci
   */

    EventEmitter.prototype.listeners = function (name) {
        if (!this.$events) {
            this.$events = {};
        }

        if (!this.$events[name]) {
            this.$events[name] = [];
        }

        if (!io.util.isArray(this.$events[name])) {
            this.$events[name] = [this.$events[name]];
        }

        return this.$events[name];
    };

    /**
   * Emits an event.
   *
   * @api public
   */

    EventEmitter.prototype.emit = function (name) {
        if (!this.$events) {
            return false;
        }

        var handler = this.$events[name];

        if (!handler) {
            return false;
        }

        var args = Array.prototype.slice.call(arguments, 1);

        if ('function' == typeof handler) {
            handler.apply(this, args);
        } else if (io.util.isArray(handler)) {
            var listeners = handler.slice();

            for (var i = 0, l = listeners.length; i < l; i++) {
                listeners[i].apply(this, args);
            }
        } else {
            return false;
        }

        return true;
    };

})(
    'undefined' != typeof io ? io : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

/**
 * Based on JSON2 (http://www.JSON.org/js.html).
 */

(function (exports, nativeJSON) {
    "use strict";

    // use native JSON if it's available
    if (nativeJSON && nativeJSON.parse){
        return exports.JSON = {
            parse: nativeJSON.parse
            , 
            stringify: nativeJSON.stringify
        }
    }

    var JSON = exports.JSON = {};

    function f(n) {
        // Format integers to have at least two digits.
        return n < 10 ? '0' + n : n;
    }

    function date(d, key) {
        return isFinite(d.valueOf()) ?
        d.getUTCFullYear()     + '-' +
        f(d.getUTCMonth() + 1) + '-' +
        f(d.getUTCDate())      + 'T' +
        f(d.getUTCHours())     + ':' +
        f(d.getUTCMinutes())   + ':' +
        f(d.getUTCSeconds())   + 'Z' : null;
    };

    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
    escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
    gap,
    indent,
    meta = {    // table of character substitutions
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '"' : '\\"',
        '\\': '\\\\'
    },
    rep;


    function quote(string) {

        // If the string contains no control characters, no quote characters, and no
        // backslash characters, then we can safely slap some quotes around it.
        // Otherwise we must also replace the offending characters with safe escape
        // sequences.

        escapable.lastIndex = 0;
        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
            var c = meta[a];
            return typeof c === 'string' ? c :
            '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
        }) + '"' : '"' + string + '"';
    }


    function str(key, holder) {

        // Produce a string from holder[key].

        var i,          // The loop counter.
        k,          // The member key.
        v,          // The member value.
        length,
        mind = gap,
        partial,
        value = holder[key];

        // If the value has a toJSON method, call it to obtain a replacement value.

        if (value instanceof Date) {
            value = date(key);
        }

        // If we were called with a replacer function, then call the replacer to
        // obtain a replacement value.

        if (typeof rep === 'function') {
            value = rep.call(holder, key, value);
        }

        // What happens next depends on the value's type.

        switch (typeof value) {
            case 'string':
                return quote(value);

            case 'number':

                // JSON numbers must be finite. Encode non-finite numbers as null.

                return isFinite(value) ? String(value) : 'null';

            case 'boolean':
            case 'null':

                // If the value is a boolean or null, convert it to a string. Note:
                // typeof null does not produce 'null'. The case is included here in
                // the remote chance that this gets fixed someday.

                return String(value);

            // If the type is 'object', we might be dealing with an object or an array or
            // null.

            case 'object':

                // Due to a specification blunder in ECMAScript, typeof null is 'object',
                // so watch out for that case.

                if (!value) {
                    return 'null';
                }

                // Make an array to hold the partial results of stringifying this object value.

                gap += indent;
                partial = [];

                // Is the value an array?

                if (Object.prototype.toString.apply(value) === '[object Array]') {

                    // The value is an array. Stringify every element. Use null as a placeholder
                    // for non-JSON values.

                    length = value.length;
                    for (i = 0; i < length; i += 1) {
                        partial[i] = str(i, value) || 'null';
                    }

                    // Join all of the elements together, separated with commas, and wrap them in
                    // brackets.

                    v = partial.length === 0 ? '[]' : gap ?
                    '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
                    '[' + partial.join(',') + ']';
                    gap = mind;
                    return v;
                }

                // If the replacer is an array, use it to select the members to be stringified.

                if (rep && typeof rep === 'object') {
                    length = rep.length;
                    for (i = 0; i < length; i += 1) {
                        if (typeof rep[i] === 'string') {
                            k = rep[i];
                            v = str(k, value);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                } else {

                    // Otherwise, iterate through all of the keys in the object.

                    for (k in value) {
                        if (Object.prototype.hasOwnProperty.call(value, k)) {
                            v = str(k, value);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                }

                // Join all of the member texts together, separated with commas,
                // and wrap them in braces.

                v = partial.length === 0 ? '{}' : gap ?
                '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
                '{' + partial.join(',') + '}';
                gap = mind;
                return v;
        }
    }

    // If the JSON object does not yet have a stringify method, give it one.

    JSON.stringify = function (value, replacer, space) {

        // The stringify method takes a value and an optional replacer, and an optional
        // space parameter, and returns a JSON text. The replacer can be a function
        // that can replace values, or an array of strings that will select the keys.
        // A default replacer method can be provided. Use of the space parameter can
        // produce text that is more easily readable.

        var i;
        gap = '';
        indent = '';

        // If the space parameter is a number, make an indent string containing that
        // many spaces.

        if (typeof space === 'number') {
            for (i = 0; i < space; i += 1) {
                indent += ' ';
            }

        // If the space parameter is a string, it will be used as the indent string.

        } else if (typeof space === 'string') {
            indent = space;
        }

        // If there is a replacer, it must be a function or an array.
        // Otherwise, throw an error.

        rep = replacer;
        if (replacer && typeof replacer !== 'function' &&
            (typeof replacer !== 'object' ||
                typeof replacer.length !== 'number')) {
            throw new Error('JSON.stringify');
        }

        // Make a fake root object containing our value under the key of ''.
        // Return the result of stringifying the value.

        return str('', {
            '': value
        });
    };

    // If the JSON object does not yet have a parse method, give it one.

    JSON.parse = function (text, reviver) {
        // The parse method takes a text and an optional reviver function, and returns
        // a JavaScript value if the text is a valid JSON text.

        var j;

        function walk(holder, key) {

            // The walk method is used to recursively walk the resulting structure so
            // that modifications can be made.

            var k, v, value = holder[key];
            if (value && typeof value === 'object') {
                for (k in value) {
                    if (Object.prototype.hasOwnProperty.call(value, k)) {
                        v = walk(value, k);
                        if (v !== undefined) {
                            value[k] = v;
                        } else {
                            delete value[k];
                        }
                    }
                }
            }
            return reviver.call(holder, key, value);
        }


        // Parsing happens in four stages. In the first stage, we replace certain
        // Unicode characters with escape sequences. JavaScript handles many characters
        // incorrectly, either silently deleting them, or treating them as line endings.

        text = String(text);
        cx.lastIndex = 0;
        if (cx.test(text)) {
            text = text.replace(cx, function (a) {
                return '\\u' +
                ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            });
        }

        // In the second stage, we run the text against regular expressions that look
        // for non-JSON patterns. We are especially concerned with '()' and 'new'
        // because they can cause invocation, and '=' because it can cause mutation.
        // But just to be safe, we want to reject all unexpected forms.

        // We split the second stage into 4 regexp operations in order to work around
        // crippling inefficiencies in IE's and Safari's regexp engines. First we
        // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
        // replace all simple value tokens with ']' characters. Third, we delete all
        // open brackets that follow a colon or comma or that begin the text. Finally,
        // we look to see that the remaining characters are only whitespace or ']' or
        // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

        if (/^[\],:{}\s]*$/
            .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

            // In the third stage we use the eval function to compile the text into a
            // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
            // in JavaScript: it can begin a block or an object literal. We wrap the text
            // in parens to eliminate the ambiguity.

            j = eval('(' + text + ')');

            // In the optional fourth stage, we recursively walk the new structure, passing
            // each name/value pair to a reviver function for possible transformation.

            return typeof reviver === 'function' ?
            walk({
                '': j
            }, '') : j;
        }

        // If the text is not JSON parseable, then a SyntaxError is thrown.

        throw new SyntaxError('JSON.parse');
    };

})(
    'undefined' != typeof io ? io : module.exports
    , typeof JSON !== 'undefined' ? JSON : undefined
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

    /**
   * Parser namespace.
   *
   * @namespace
   */

    var parser = exports.parser = {};

    /**
   * Packet types.
   */

    var packets = parser.packets = [
    'disconnect'
    , 'connect'
    , 'heartbeat'
    , 'message'
    , 'json'
    , 'event'
    , 'ack'
    , 'error'
    , 'noop'
    ];

    /**
   * Errors reasons.
   */

    var reasons = parser.reasons = [
    'transport not supported'
    , 'client not handshaken'
    , 'unauthorized'
    ];

    /**
   * Errors advice.
   */

    var advice = parser.advice = [
    'reconnect'
    ];

    /**
   * Shortcuts.
   */

    var JSON = io.JSON
    , indexOf = io.util.indexOf;

    /**
   * Encodes a packet.
   *
   * @api private
   */

    parser.encodePacket = function (packet) {
        var type = indexOf(packets, packet.type)
        , id = packet.id || ''
        , endpoint = packet.endpoint || ''
        , ack = packet.ack
        , data = null;

        switch (packet.type) {
            case 'error':
                var reason = packet.reason ? indexOf(reasons, packet.reason) : ''
                , adv = packet.advice ? indexOf(advice, packet.advice) : '';

                if (reason !== '' || adv !== '')
                    data = reason + (adv !== '' ? ('+' + adv) : '');

                break;

            case 'message':
                if (packet.data !== '')
                    data = packet.data;
                break;

            case 'event':
                var ev = {
                    name: packet.name
                };

                if (packet.args && packet.args.length) {
                    ev.args = packet.args;
                }

                data = JSON.stringify(ev);
                break;

            case 'json':
                data = JSON.stringify(packet.data);
                break;

            case 'connect':
                if (packet.qs)
                    data = packet.qs;
                break;

            case 'ack':
                data = packet.ackId
                + (packet.args && packet.args.length
                    ? '+' + JSON.stringify(packet.args) : '');
                break;
        }

        // construct packet with required fragments
        var encoded = [
        type
        , id + (ack == 'data' ? '+' : '')
        , endpoint
        ];

        // data fragment is optional
        if (data !== null && data !== undefined)
            encoded.push(data);

        return encoded.join(':');
    };

    /**
   * Encodes multiple messages (payload).
   *
   * @param {Array} messages
   * @api private
   */

    parser.encodePayload = function (packets) {
        var decoded = '';

        if (packets.length == 1)
            return packets[0];

        for (var i = 0, l = packets.length; i < l; i++) {
            var packet = packets[i];
            decoded += '\ufffd' + packet.length + '\ufffd' + packets[i];
        }

        return decoded;
    };

    /**
   * Decodes a packet
   *
   * @api private
   */

    var regexp = /([^:]+):([0-9]+)?(\+)?:([^:]+)?:?([\s\S]*)?/;

    parser.decodePacket = function (data) {
        var pieces = data.match(regexp);

        if (!pieces) return {};

        var id = pieces[2] || ''
        , data = pieces[5] || ''
        , packet = {
            type: packets[pieces[1]]
            , 
            endpoint: pieces[4] || ''
        };

        // whether we need to acknowledge the packet
        if (id) {
            packet.id = id;
            if (pieces[3])
                packet.ack = 'data';
            else
                packet.ack = true;
        }

        // handle different packet types
        switch (packet.type) {
            case 'error':
                var pieces = data.split('+');
                packet.reason = reasons[pieces[0]] || '';
                packet.advice = advice[pieces[1]] || '';
                break;

            case 'message':
                packet.data = data || '';
                break;

            case 'event':
                try {
                    var opts = JSON.parse(data);
                    packet.name = opts.name;
                    packet.args = opts.args;
                } catch (e) { }

                packet.args = packet.args || [];
                break;

            case 'json':
                try {
                    packet.data = JSON.parse(data);
                } catch (e) { }
                break;

            case 'connect':
                packet.qs = data || '';
                break;

            case 'ack':
                var pieces = data.match(/^([0-9]+)(\+)?(.*)/);
                if (pieces) {
                    packet.ackId = pieces[1];
                    packet.args = [];

                    if (pieces[3]) {
                        try {
                            packet.args = pieces[3] ? JSON.parse(pieces[3]) : [];
                        } catch (e) { }
                    }
                }
                break;

            case 'disconnect':
            case 'heartbeat':
                break;
        };

        return packet;
    };

    /**
   * Decodes data payload. Detects multiple messages
   *
   * @return {Array} messages
   * @api public
   */

    parser.decodePayload = function (data) {
        // IE doesn't like data[i] for unicode chars, charAt works fine
        if (data.charAt(0) == '\ufffd') {
            var ret = [];

            for (var i = 1, length = ''; i < data.length; i++) {
                if (data.charAt(i) == '\ufffd') {
                    ret.push(parser.decodePacket(data.substr(i + 1).substr(0, length)));
                    i += Number(length) + 1;
                    length = '';
                } else {
                    length += data.charAt(i);
                }
            }

            return ret;
        } else {
            return [parser.decodePacket(data)];
        }
    };

})(
    'undefined' != typeof io ? io : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    );
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

    /**
   * Expose constructor.
   */

    exports.Transport = Transport;

    /**
   * This is the transport template for all supported transport methods.
   *
   * @constructor
   * @api public
   */

    function Transport (socket, sessid) {
        this.socket = socket;
        this.sessid = sessid;
    };

    /**
   * Apply EventEmitter mixin.
   */

    io.util.mixin(Transport, io.EventEmitter);

    /**
   * Handles the response from the server. When a new response is received
   * it will automatically update the timeout, decode the message and
   * forwards the response to the onMessage function for further processing.
   *
   * @param {String} data Response from the server.
   * @api private
   */

    Transport.prototype.onData = function (data) {
        this.clearCloseTimeout();
    
        // If the connection in currently open (or in a reopening state) reset the close 
        // timeout since we have just received data. This check is necessary so
        // that we don't reset the timeout on an explicitly disconnected connection.
        if (this.connected || this.connecting || this.reconnecting) {
            this.setCloseTimeout();
        }

        if (data !== '') {
            // todo: we should only do decodePayload for xhr transports
            var msgs = io.parser.decodePayload(data);

            if (msgs && msgs.length) {
                for (var i = 0, l = msgs.length; i < l; i++) {
                    this.onPacket(msgs[i]);
                }
            }
        }

        return this;
    };

    /**
   * Handles packets.
   *
   * @api private
   */

    Transport.prototype.onPacket = function (packet) {
        if (packet.type == 'heartbeat') {
            return this.onHeartbeat();
        }

        if (packet.type == 'connect' && packet.endpoint == '') {
            this.onConnect();
        }

        this.socket.onPacket(packet);

        return this;
    };

    /**
   * Sets close timeout
   *
   * @api private
   */
  
    Transport.prototype.setCloseTimeout = function () {
        if (!this.closeTimeout) {
            var self = this;

            this.closeTimeout = setTimeout(function () {
                self.onDisconnect();
            }, this.socket.closeTimeout);
        }
    };

    /**
   * Called when transport disconnects.
   *
   * @api private
   */

    Transport.prototype.onDisconnect = function () {
        if (this.close && this.open) this.close();
        this.clearTimeouts();
        this.socket.onDisconnect();
        return this;
    };

    /**
   * Called when transport connects
   *
   * @api private
   */

    Transport.prototype.onConnect = function () {
        this.socket.onConnect();
        return this;
    }

    /**
   * Clears close timeout
   *
   * @api private
   */

    Transport.prototype.clearCloseTimeout = function () {
        if (this.closeTimeout) {
            clearTimeout(this.closeTimeout);
            this.closeTimeout = null;
        }
    };

    /**
   * Clear timeouts
   *
   * @api private
   */

    Transport.prototype.clearTimeouts = function () {
        this.clearCloseTimeout();

        if (this.reopenTimeout) {
            clearTimeout(this.reopenTimeout);
        }
    };

    /**
   * Sends a packet
   *
   * @param {Object} packet object.
   * @api private
   */

    Transport.prototype.packet = function (packet) {
        this.send(io.parser.encodePacket(packet));
    };

    /**
   * Send the received heartbeat message back to server. So the server
   * knows we are still connected.
   *
   * @param {String} heartbeat Heartbeat response from the server.
   * @api private
   */

    Transport.prototype.onHeartbeat = function (heartbeat) {
        this.packet({
            type: 'heartbeat'
        });
    };
 
    /**
   * Called when the transport opens.
   *
   * @api private
   */

    Transport.prototype.onOpen = function () {
        this.open = true;
        this.clearCloseTimeout();
        this.socket.onOpen();
    };

    /**
   * Notifies the base when the connection with the Socket.IO server
   * has been disconnected.
   *
   * @api private
   */

    Transport.prototype.onClose = function () {
        var self = this;

        /* FIXME: reopen delay causing a infinit loop
    this.reopenTimeout = setTimeout(function () {
      self.open();
    }, this.socket.options['reopen delay']);*/

        this.open = false;
        this.socket.onClose();
        this.onDisconnect();
    };

    /**
   * Generates a connection url based on the Socket.IO URL Protocol.
   * See <https://github.com/learnboost/socket.io-node/> for more details.
   *
   * @returns {String} Connection url
   * @api private
   */

    Transport.prototype.prepareUrl = function () {
        var options = this.socket.options;

        return this.scheme() + '://'
        + options.host + ':' + options.port + '/'
        + options.resource + '/' + io.protocol
        + '/' + this.name + '/' + this.sessid;
    };

    /**
   * Checks if the transport is ready to start a connection.
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

    Transport.prototype.ready = function (socket, fn) {
        fn.call(this);
    };
})(
    'undefined' != typeof io ? io : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

    /**
   * Expose constructor.
   */

    exports.Socket = Socket;

    /**
   * Create a new `Socket.IO client` which can establish a persistent
   * connection with a Socket.IO enabled server.
   *
   * @api public
   */

    function Socket (options) {
        this.options = {
            port: 80
            , 
            secure: false
            , 
            document: 'document' in global ? document : false
            , 
            resource: 'socket.io'
            , 
            transports: io.transports
            , 
            'connect timeout': 10000
            , 
            'try multiple transports': true
            , 
            'reconnect': true
            , 
            'reconnection delay': 500
            , 
            'reconnection limit': Infinity
            , 
            'reopen delay': 3000
            , 
            'max reconnection attempts': 10
            , 
            'sync disconnect on unload': true
            , 
            'auto connect': true
            , 
            'flash policy port': 10843
        };

        io.util.merge(this.options, options);

        this.connected = false;
        this.open = false;
        this.connecting = false;
        this.reconnecting = false;
        this.namespaces = {};
        this.buffer = [];
        this.doBuffer = false;

        if (this.options['sync disconnect on unload'] &&
            (!this.isXDomain() || io.util.ua.hasCORS)) {
            var self = this;

            io.util.on(global, 'beforeunload', function () {
                self.disconnectSync();
            }, false);
        }

        if (this.options['auto connect']) {
            this.connect();
        }
    };

    /**
   * Apply EventEmitter mixin.
   */

    io.util.mixin(Socket, io.EventEmitter);

    /**
   * Returns a namespace listener/emitter for this socket
   *
   * @api public
   */

    Socket.prototype.of = function (name) {
        if (!this.namespaces[name]) {
            this.namespaces[name] = new io.SocketNamespace(this, name);

            if (name !== '') {
                this.namespaces[name].packet({
                    type: 'connect'
                });
            }
        }

        return this.namespaces[name];
    };

    /**
   * Emits the given event to the Socket and all namespaces
   *
   * @api private
   */

    Socket.prototype.publish = function () {
        this.emit.apply(this, arguments);

        var nsp;

        for (var i in this.namespaces) {
            if (this.namespaces.hasOwnProperty(i)) {
                nsp = this.of(i);
                nsp.$emit.apply(nsp, arguments);
            }
        }
    };

    /**
   * Performs the handshake
   *
   * @api private
   */

    function empty () { };

    Socket.prototype.handshake = function (fn) {
        var self = this
        , options = this.options;

        function complete (data) {
            if (data instanceof Error) {
                self.onError(data.message);
            } else {
                fn.apply(null, data.split(':'));
            }
        };

        var url = [
        'http' + (options.secure ? 's' : '') + ':/'
        , options.host + ':' + options.port
        , options.resource
        , io.protocol
        , io.util.query(this.options.query, 't=' + +new Date)
        ].join('/');

        if (this.isXDomain() && !io.util.ua.hasCORS) {
            var insertAt = document.getElementsByTagName('script')[0]
            , script = document.createElement('script');

            script.src = url + '&jsonp=' + io.j.length;
            insertAt.parentNode.insertBefore(script, insertAt);

            io.j.push(function (data) {
                complete(data);
                script.parentNode.removeChild(script);
            });
        } else {
            var xhr = io.util.request();

            xhr.open('GET', url, true);
            xhr.onreadystatechange = function () {
                if (xhr.readyState == 4) {
                    xhr.onreadystatechange = empty;

                    if (xhr.status == 200) {
                        complete(xhr.responseText);
                    } else {
                        !self.reconnecting && self.onError(xhr.responseText);
                    }
                }
            };
            xhr.send(null);
        }
    };

    /**
   * Find an available transport based on the options supplied in the constructor.
   *
   * @api private
   */

    Socket.prototype.getTransport = function (override) {
        var transports = override || this.transports, match;

        for (var i = 0, transport; transport = transports[i]; i++) {
            if (io.Transport[transport]
                && io.Transport[transport].check(this)
                && (!this.isXDomain() || io.Transport[transport].xdomainCheck())) {
                return new io.Transport[transport](this, this.sessionid);
            }
        }

        return null;
    };

    /**
   * Connects to the server.
   *
   * @param {Function} [fn] Callback.
   * @returns {io.Socket}
   * @api public
   */

    Socket.prototype.connect = function (fn) {
        if (this.connecting) {
            return this;
        }

        var self = this;

        this.handshake(function (sid, heartbeat, close, transports) {
            self.sessionid = sid;
            self.closeTimeout = close * 1000;
            self.heartbeatTimeout = heartbeat * 1000;
            self.transports = io.util.intersect(
                transports.split(',')
                , self.options.transports
                );

            function connect (transports){
                if (self.transport) self.transport.clearTimeouts();

                self.transport = self.getTransport(transports);
                if (!self.transport) return self.publish('connect_failed');

                // once the transport is ready
                self.transport.ready(self, function () {
                    self.connecting = true;
                    self.publish('connecting', self.transport.name);
                    self.transport.open();

                    if (self.options['connect timeout']) {
                        self.connectTimeoutTimer = setTimeout(function () {
                            if (!self.connected) {
                                self.connecting = false;

                                if (self.options['try multiple transports']) {
                                    if (!self.remainingTransports) {
                                        self.remainingTransports = self.transports.slice(0);
                                    }

                                    var remaining = self.remainingTransports;

                                    while (remaining.length > 0 && remaining.splice(0,1)[0] !=
                                        self.transport.name) {}

                                    if (remaining.length){
                                        connect(remaining);
                                    } else {
                                        self.publish('connect_failed');
                                    }
                                }
                            }
                        }, self.options['connect timeout']);
                    }
                });
            }

            connect();

            self.once('connect', function (){
                clearTimeout(self.connectTimeoutTimer);

                fn && typeof fn == 'function' && fn();
            });
        });

        return this;
    };

    /**
   * Sends a message.
   *
   * @param {Object} data packet.
   * @returns {io.Socket}
   * @api public
   */

    Socket.prototype.packet = function (data) {
        if (this.connected && !this.doBuffer) {
            this.transport.packet(data);
        } else {
            this.buffer.push(data);
        }

        return this;
    };

    /**
   * Sets buffer state
   *
   * @api private
   */

    Socket.prototype.setBuffer = function (v) {
        this.doBuffer = v;

        if (!v && this.connected && this.buffer.length) {
            this.transport.payload(this.buffer);
            this.buffer = [];
        }
    };

    /**
   * Disconnect the established connect.
   *
   * @returns {io.Socket}
   * @api public
   */

    Socket.prototype.disconnect = function () {
        if (this.connected) {
            if (this.open) {
                this.of('').packet({
                    type: 'disconnect'
                });
            }

            // handle disconnection immediately
            this.onDisconnect('booted');
        }

        return this;
    };

    /**
   * Disconnects the socket with a sync XHR.
   *
   * @api private
   */

    Socket.prototype.disconnectSync = function () {
        // ensure disconnection
        var xhr = io.util.request()
        , uri = this.resource + '/' + io.protocol + '/' + this.sessionid;

        xhr.open('GET', uri, true);

        // handle disconnection immediately
        this.onDisconnect('booted');
    };

    /**
   * Check if we need to use cross domain enabled transports. Cross domain would
   * be a different port or different domain name.
   *
   * @returns {Boolean}
   * @api private
   */

    Socket.prototype.isXDomain = function () {

        var port = global.location.port ||
        ('https:' == global.location.protocol ? 443 : 80);

        return this.options.host !== global.location.hostname 
        || this.options.port != port;
    };

    /**
   * Called upon handshake.
   *
   * @api private
   */

    Socket.prototype.onConnect = function () {
        if (!this.connected) {
            this.connected = true;
            this.connecting = false;
            if (!this.doBuffer) {
                // make sure to flush the buffer
                this.setBuffer(false);
            }
            this.emit('connect');
        }
    };

    /**
   * Called when the transport opens
   *
   * @api private
   */

    Socket.prototype.onOpen = function () {
        this.open = true;
    };

    /**
   * Called when the transport closes.
   *
   * @api private
   */

    Socket.prototype.onClose = function () {
        this.open = false;
    };

    /**
   * Called when the transport first opens a connection
   *
   * @param text
   */

    Socket.prototype.onPacket = function (packet) {
        this.of(packet.endpoint).onPacket(packet);
    };

    /**
   * Handles an error.
   *
   * @api private
   */

    Socket.prototype.onError = function (err) {
        if (err && err.advice) {
            if (err.advice === 'reconnect' && this.connected) {
                this.disconnect();
                this.reconnect();
            }
        }

        this.publish('error', err && err.reason ? err.reason : err);
    };

    /**
   * Called when the transport disconnects.
   *
   * @api private
   */

    Socket.prototype.onDisconnect = function (reason) {
        var wasConnected = this.connected;

        this.connected = false;
        this.connecting = false;
        this.open = false;

        if (wasConnected) {
            this.transport.close();
            this.transport.clearTimeouts();
            this.publish('disconnect', reason);

            if ('booted' != reason && this.options.reconnect && !this.reconnecting) {
                this.reconnect();
            }
        }
    };

    /**
   * Called upon reconnection.
   *
   * @api private
   */

    Socket.prototype.reconnect = function () {
        this.reconnecting = true;
        this.reconnectionAttempts = 0;
        this.reconnectionDelay = this.options['reconnection delay'];

        var self = this
        , maxAttempts = this.options['max reconnection attempts']
        , tryMultiple = this.options['try multiple transports']
        , limit = this.options['reconnection limit'];

        function reset () {
            if (self.connected) {
                for (var i in self.namespaces) {
                    if (self.namespaces.hasOwnProperty(i) && '' !== i) {
                        self.namespaces[i].packet({
                            type: 'connect'
                        });
                    }
                }
                self.publish('reconnect', self.transport.name, self.reconnectionAttempts);
            }

            self.removeListener('connect_failed', maybeReconnect);
            self.removeListener('connect', maybeReconnect);

            self.reconnecting = false;

            delete self.reconnectionAttempts;
            delete self.reconnectionDelay;
            delete self.reconnectionTimer;
            delete self.redoTransports;

            self.options['try multiple transports'] = tryMultiple;
        };

        function maybeReconnect () {
            if (!self.reconnecting) {
                return;
            }

            if (self.connected) {
                return reset();
            };

            if (self.connecting && self.reconnecting) {
                return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
            }

            if (self.reconnectionAttempts++ >= maxAttempts) {
                if (!self.redoTransports) {
                    self.on('connect_failed', maybeReconnect);
                    self.options['try multiple transports'] = true;
                    self.transport = self.getTransport();
                    self.redoTransports = true;
                    self.connect();
                } else {
                    self.publish('reconnect_failed');
                    reset();
                }
            } else {
                if (self.reconnectionDelay < limit) {
                    self.reconnectionDelay *= 2; // exponential back off
                }

                self.connect();
                self.publish('reconnecting', self.reconnectionDelay, self.reconnectionAttempts);
                self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
            }
        };

        this.options['try multiple transports'] = false;
        this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);

        this.on('connect', maybeReconnect);
    };

})(
    'undefined' != typeof io ? io : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    , this
    );
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

    /**
   * Expose constructor.
   */

    exports.SocketNamespace = SocketNamespace;

    /**
   * Socket namespace constructor.
   *
   * @constructor
   * @api public
   */

    function SocketNamespace (socket, name) {
        this.socket = socket;
        this.name = name || '';
        this.flags = {};
        this.json = new Flag(this, 'json');
        this.ackPackets = 0;
        this.acks = {};
    };

    /**
   * Apply EventEmitter mixin.
   */

    io.util.mixin(SocketNamespace, io.EventEmitter);

    /**
   * Copies emit since we override it
   *
   * @api private
   */

    SocketNamespace.prototype.$emit = io.EventEmitter.prototype.emit;

    /**
   * Creates a new namespace, by proxying the request to the socket. This
   * allows us to use the synax as we do on the server.
   *
   * @api public
   */

    SocketNamespace.prototype.of = function () {
        return this.socket.of.apply(this.socket, arguments);
    };

    /**
   * Sends a packet.
   *
   * @api private
   */

    SocketNamespace.prototype.packet = function (packet) {
        packet.endpoint = this.name;
        this.socket.packet(packet);
        this.flags = {};
        return this;
    };

    /**
   * Sends a message
   *
   * @api public
   */

    SocketNamespace.prototype.send = function (data, fn) {
        var packet = {
            type: this.flags.json ? 'json' : 'message'
            , 
            data: data
        };

        if ('function' == typeof fn) {
            packet.id = ++this.ackPackets;
            packet.ack = true;
            this.acks[packet.id] = fn;
        }

        return this.packet(packet);
    };

    /**
   * Emits an event
   *
   * @api public
   */
  
    SocketNamespace.prototype.emit = function (name) {
        var args = Array.prototype.slice.call(arguments, 1)
        , lastArg = args[args.length - 1]
        , packet = {
            type: 'event'
            , 
            name: name
        };

        if ('function' == typeof lastArg) {
            packet.id = ++this.ackPackets;
            packet.ack = 'data';
            this.acks[packet.id] = lastArg;
            args = args.slice(0, args.length - 1);
        }

        packet.args = args;

        return this.packet(packet);
    };

    /**
   * Disconnects the namespace
   *
   * @api private
   */

    SocketNamespace.prototype.disconnect = function () {
        if (this.name === '') {
            this.socket.disconnect();
        } else {
            this.packet({
                type: 'disconnect'
            });
            this.$emit('disconnect');
        }

        return this;
    };

    /**
   * Handles a packet
   *
   * @api private
   */

    SocketNamespace.prototype.onPacket = function (packet) {
        var self = this;

        function ack () {
            self.packet({
                type: 'ack'
                , 
                args: io.util.toArray(arguments)
                , 
                ackId: packet.id
            });
        };

        switch (packet.type) {
            case 'connect':
                this.$emit('connect');
                break;

            case 'disconnect':
                if (this.name === '') {
                    this.socket.onDisconnect(packet.reason || 'booted');
                } else {
                    this.$emit('disconnect', packet.reason);
                }
                break;

            case 'message':
            case 'json':
                var params = ['message', packet.data];

                if (packet.ack == 'data') {
                    params.push(ack);
                } else if (packet.ack) {
                    this.packet({
                        type: 'ack', 
                        ackId: packet.id
                    });
                }

                this.$emit.apply(this, params);
                break;

            case 'event':
                var params = [packet.name].concat(packet.args);

                if (packet.ack == 'data')
                    params.push(ack);

                this.$emit.apply(this, params);
                break;

            case 'ack':
                if (this.acks[packet.ackId]) {
                    this.acks[packet.ackId].apply(this, packet.args);
                    delete this.acks[packet.ackId];
                }
                break;

            case 'error':
                if (packet.advice){
                    this.socket.onError(packet);
                } else {
                    if (packet.reason == 'unauthorized') {
                        this.$emit('connect_failed', packet.reason);
                    } else {
                        this.$emit('error', packet.reason);
                    }
                }
                break;
        }
    };

    /**
   * Flag interface.
   *
   * @api private
   */

    function Flag (nsp, name) {
        this.namespace = nsp;
        this.name = name;
    };

    /**
   * Send a message
   *
   * @api public
   */

    Flag.prototype.send = function () {
        this.namespace.flags[this.name] = true;
        this.namespace.send.apply(this.namespace, arguments);
    };

    /**
   * Emit an event
   *
   * @api public
   */

    Flag.prototype.emit = function () {
        this.namespace.flags[this.name] = true;
        this.namespace.emit.apply(this.namespace, arguments);
    };

})(
    'undefined' != typeof io ? io : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

    /**
   * Expose constructor.
   */

    exports.websocket = WS;

    /**
   * The WebSocket transport uses the HTML5 WebSocket API to establish an
   * persistent connection with the Socket.IO server. This transport will also
   * be inherited by the FlashSocket fallback as it provides a API compatible
   * polyfill for the WebSockets.
   *
   * @constructor
   * @extends {io.Transport}
   * @api public
   */

    function WS (socket) {
        io.Transport.apply(this, arguments);
    };

    /**
   * Inherits from Transport.
   */

    io.util.inherit(WS, io.Transport);

    /**
   * Transport name
   *
   * @api public
   */

    WS.prototype.name = 'websocket';

    /**
   * Initializes a new `WebSocket` connection with the Socket.IO server. We attach
   * all the appropriate listeners to handle the responses from the server.
   *
   * @returns {Transport}
   * @api public
   */

    WS.prototype.open = function () {
        var query = io.util.query(this.socket.options.query)
        , self = this
        , Socket


        if (!Socket) {
            Socket = global.MozWebSocket || global.WebSocket;
        }

        this.websocket = new Socket(this.prepareUrl() + query);

        this.websocket.onopen = function () {
            self.onOpen();
            self.socket.setBuffer(false);
        };
        this.websocket.onmessage = function (ev) {
            self.onData(ev.data);
        };
        this.websocket.onclose = function () {
            self.onClose();
            self.socket.setBuffer(true);
        };
        this.websocket.onerror = function (e) {
            self.onError(e);
        };

        return this;
    };

    /**
   * Send a message to the Socket.IO server. The message will automatically be
   * encoded in the correct message format.
   *
   * @returns {Transport}
   * @api public
   */

    WS.prototype.send = function (data) {
        this.websocket.send(data);
        return this;
    };

    /**
   * Payload
   *
   * @api private
   */

    WS.prototype.payload = function (arr) {
        for (var i = 0, l = arr.length; i < l; i++) {
            this.packet(arr[i]);
        }
        return this;
    };

    /**
   * Disconnect the established `WebSocket` connection.
   *
   * @returns {Transport}
   * @api public
   */

    WS.prototype.close = function () {
        this.websocket.close();
        return this;
    };

    /**
   * Handle the errors that `WebSocket` might be giving when we
   * are attempting to connect or send messages.
   *
   * @param {Error} e The error.
   * @api private
   */

    WS.prototype.onError = function (e) {
        this.socket.onError(e);
    };

    /**
   * Returns the appropriate scheme for the URI generation.
   *
   * @api private
   */
    WS.prototype.scheme = function () {
        return this.socket.options.secure ? 'wss' : 'ws';
    };

    /**
   * Checks if the browser has support for native `WebSockets` and that
   * it's not the polyfill created for the FlashSocket transport.
   *
   * @return {Boolean}
   * @api public
   */

    WS.check = function () {
        return ('WebSocket' in global && !('__addTask' in WebSocket))
        || 'MozWebSocket' in global;
    };

    /**
   * Check if the `WebSocket` transport support cross domain communications.
   *
   * @returns {Boolean}
   * @api public
   */

    WS.xdomainCheck = function () {
        return true;
    };

    /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

    io.transports.push('websocket');

})(
    'undefined' != typeof io ? io.Transport : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    , this
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

    /**
   * Expose constructor.
   *
   * @api public
   */
  
    exports.XHR = XHR;

    /**
   * XHR constructor
   *
   * @costructor
   * @api public
   */

    function XHR (socket) {
        if (!socket) return;

        io.Transport.apply(this, arguments);
        this.sendBuffer = [];
    };

    /**
   * Inherits from Transport.
   */

    io.util.inherit(XHR, io.Transport);

    /**
   * Establish a connection
   *
   * @returns {Transport}
   * @api public
   */

    XHR.prototype.open = function () {
        this.socket.setBuffer(false);
        this.onOpen();
        this.get();

        // we need to make sure the request succeeds since we have no indication
        // whether the request opened or not until it succeeded.
        this.setCloseTimeout();

        return this;
    };

    /**
   * Check if we need to send data to the Socket.IO server, if we have data in our
   * buffer we encode it and forward it to the `post` method.
   *
   * @api private
   */

    XHR.prototype.payload = function (payload) {
        var msgs = [];

        for (var i = 0, l = payload.length; i < l; i++) {
            msgs.push(io.parser.encodePacket(payload[i]));
        }

        this.send(io.parser.encodePayload(msgs));
    };

    /**
   * Send data to the Socket.IO server.
   *
   * @param data The message
   * @returns {Transport}
   * @api public
   */

    XHR.prototype.send = function (data) {
        this.post(data);
        return this;
    };

    /**
   * Posts a encoded message to the Socket.IO server.
   *
   * @param {String} data A encoded message.
   * @api private
   */

    function empty () { };

    XHR.prototype.post = function (data) {
        var self = this;
        this.socket.setBuffer(true);

        function stateChange () {
            if (this.readyState == 4) {
                this.onreadystatechange = empty;
                self.posting = false;

                if (this.status == 200){
                    self.socket.setBuffer(false);
                } else {
                    self.onClose();
                }
            }
        }

        function onload () {
            this.onload = empty;
            self.socket.setBuffer(false);
        };

        this.sendXHR = this.request('POST');

        if (global.XDomainRequest && this.sendXHR instanceof XDomainRequest) {
            this.sendXHR.onload = this.sendXHR.onerror = onload;
        } else {
            this.sendXHR.onreadystatechange = stateChange;
        }

        this.sendXHR.send(data);
    };

    /**
   * Disconnects the established `XHR` connection.
   *
   * @returns {Transport} 
   * @api public
   */

    XHR.prototype.close = function () {
        this.onClose();
        return this;
    };

    /**
   * Generates a configured XHR request
   *
   * @param {String} url The url that needs to be requested.
   * @param {String} method The method the request should use.
   * @returns {XMLHttpRequest}
   * @api private
   */

    XHR.prototype.request = function (method) {
        var req = io.util.request(this.socket.isXDomain())
        , query = io.util.query(this.socket.options.query, 't=' + +new Date);

        req.open(method || 'GET', this.prepareUrl() + query, true);

        if (method == 'POST') {
            try {
                if (req.setRequestHeader) {
                    req.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
                } else {
                    // XDomainRequest
                    req.contentType = 'text/plain';
                }
            } catch (e) {}
        }

        return req;
    };

    /**
   * Returns the scheme to use for the transport URLs.
   *
   * @api private
   */

    XHR.prototype.scheme = function () {
        return this.socket.options.secure ? 'https' : 'http';
    };

    /**
   * Check if the XHR transports are supported
   *
   * @param {Boolean} xdomain Check if we support cross domain requests.
   * @returns {Boolean}
   * @api public
   */

    XHR.check = function (socket, xdomain) {
        try {
            if (io.util.request(xdomain)) {
                return true;
            }
        } catch(e) {}

        return false;
    };

    /**
   * Check if the XHR transport supports corss domain requests.
   * 
   * @returns {Boolean}
   * @api public
   */

    XHR.xdomainCheck = function () {
        return XHR.check(null, true);
    };

})(
    'undefined' != typeof io ? io.Transport : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    , this
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

    /**
   * Expose constructor.
   */

    exports.htmlfile = HTMLFile;

    /**
   * The HTMLFile transport creates a `forever iframe` based transport
   * for Internet Explorer. Regular forever iframe implementations will 
   * continuously trigger the browsers buzy indicators. If the forever iframe
   * is created inside a `htmlfile` these indicators will not be trigged.
   *
   * @constructor
   * @extends {io.Transport.XHR}
   * @api public
   */

    function HTMLFile (socket) {
        io.Transport.XHR.apply(this, arguments);
    };

    /**
   * Inherits from XHR transport.
   */

    io.util.inherit(HTMLFile, io.Transport.XHR);

    /**
   * Transport name
   *
   * @api public
   */

    HTMLFile.prototype.name = 'htmlfile';

    /**
   * Creates a new ActiveX `htmlfile` with a forever loading iframe
   * that can be used to listen to messages. Inside the generated
   * `htmlfile` a reference will be made to the HTMLFile transport.
   *
   * @api private
   */

    HTMLFile.prototype.get = function () {
        this.doc = new ActiveXObject('htmlfile');
        this.doc.open();
        this.doc.write('<html></html>');
        this.doc.close();
        this.doc.parentWindow.s = this;

        var iframeC = this.doc.createElement('div');
        iframeC.className = 'socketio';

        this.doc.body.appendChild(iframeC);
        this.iframe = this.doc.createElement('iframe');

        iframeC.appendChild(this.iframe);

        var self = this
        , query = io.util.query(this.socket.options.query, 't='+ +new Date);

        this.iframe.src = this.prepareUrl() + query;

        io.util.on(window, 'unload', function () {
            self.destroy();
        });
    };

    /**
   * The Socket.IO server will write script tags inside the forever
   * iframe, this function will be used as callback for the incoming
   * information.
   *
   * @param {String} data The message
   * @param {document} doc Reference to the context
   * @api private
   */

    HTMLFile.prototype._ = function (data, doc) {
        this.onData(data);
        try {
            var script = doc.getElementsByTagName('script')[0];
            script.parentNode.removeChild(script);
        } catch (e) { }
    };

    /**
   * Destroy the established connection, iframe and `htmlfile`.
   * And calls the `CollectGarbage` function of Internet Explorer
   * to release the memory.
   *
   * @api private
   */

    HTMLFile.prototype.destroy = function () {
        if (this.iframe){
            try {
                this.iframe.src = 'about:blank';
            } catch(e){}

            this.doc = null;
            this.iframe.parentNode.removeChild(this.iframe);
            this.iframe = null;

            CollectGarbage();
        }
    };

    /**
   * Disconnects the established connection.
   *
   * @returns {Transport} Chaining.
   * @api public
   */

    HTMLFile.prototype.close = function () {
        this.destroy();
        return io.Transport.XHR.prototype.close.call(this);
    };

    /**
   * Checks if the browser supports this transport. The browser
   * must have an `ActiveXObject` implementation.
   *
   * @return {Boolean}
   * @api public
   */

    HTMLFile.check = function () {
        if ('ActiveXObject' in window){
            try {
                var a = new ActiveXObject('htmlfile');
                return a && io.Transport.XHR.check();
            } catch(e){}
        }
        return false;
    };

    /**
   * Check if cross domain requests are supported.
   *
   * @returns {Boolean}
   * @api public
   */

    HTMLFile.xdomainCheck = function () {
        // we can probably do handling for sub-domains, we should
        // test that it's cross domain but a subdomain here
        return false;
    };

    /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

    io.transports.push('htmlfile');

})(
    'undefined' != typeof io ? io.Transport : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

    /**
   * Expose constructor.
   */

    exports['xhr-polling'] = XHRPolling;

    /**
   * The XHR-polling transport uses long polling XHR requests to create a
   * "persistent" connection with the server.
   *
   * @constructor
   * @api public
   */

    function XHRPolling () {
        io.Transport.XHR.apply(this, arguments);
    };

    /**
   * Inherits from XHR transport.
   */

    io.util.inherit(XHRPolling, io.Transport.XHR);

    /**
   * Merge the properties from XHR transport
   */

    io.util.merge(XHRPolling, io.Transport.XHR);

    /**
   * Transport name
   *
   * @api public
   */

    XHRPolling.prototype.name = 'xhr-polling';

    /** 
   * Establish a connection, for iPhone and Android this will be done once the page
   * is loaded.
   *
   * @returns {Transport} Chaining.
   * @api public
   */

    XHRPolling.prototype.open = function () {
        var self = this;

        io.Transport.XHR.prototype.open.call(self);
        return false;
    };

    /**
   * Starts a XHR request to wait for incoming messages.
   *
   * @api private
   */

    function empty () {};

    XHRPolling.prototype.get = function () {
        if (!this.open) return;

        var self = this;

        function stateChange () {
            if (this.readyState == 4) {
                this.onreadystatechange = empty;

                if (this.status == 200) {
                    self.onData(this.responseText);
                    self.get();
                } else {
                    self.onClose();
                }
            }
        };

        function onload () {
            this.onload = empty;
            self.onData(this.responseText);
            self.get();
        };

        this.xhr = this.request();

        if (global.XDomainRequest && this.xhr instanceof XDomainRequest) {
            this.xhr.onload = this.xhr.onerror = onload;
        } else {
            this.xhr.onreadystatechange = stateChange;
        }

        this.xhr.send(null);
    };

    /**
   * Handle the unclean close behavior.
   *
   * @api private
   */

    XHRPolling.prototype.onClose = function () {
        io.Transport.XHR.prototype.onClose.call(this);

        if (this.xhr) {
            this.xhr.onreadystatechange = this.xhr.onload = empty;
            try {
                this.xhr.abort();
            } catch(e){}
            this.xhr = null;
        }
    };

    /**
   * Webkit based browsers show a infinit spinner when you start a XHR request
   * before the browsers onload event is called so we need to defer opening of
   * the transport until the onload event is called. Wrapping the cb in our
   * defer method solve this.
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

    XHRPolling.prototype.ready = function (socket, fn) {
        var self = this;

        io.util.defer(function () {
            fn.call(self);
        });
    };

    /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

    io.transports.push('xhr-polling');

})(
    'undefined' != typeof io ? io.Transport : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    , this
    );

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {
    /**
   * There is a way to hide the loading indicator in Firefox. If you create and
   * remove a iframe it will stop showing the current loading indicator.
   * Unfortunately we can't feature detect that and UA sniffing is evil.
   *
   * @api private
   */

    var indicator = global.document && "MozAppearance" in
    global.document.documentElement.style;

    /**
   * Expose constructor.
   */

    exports['jsonp-polling'] = JSONPPolling;

    /**
   * The JSONP transport creates an persistent connection by dynamically
   * inserting a script tag in the page. This script tag will receive the
   * information of the Socket.IO server. When new information is received
   * it creates a new script tag for the new data stream.
   *
   * @constructor
   * @extends {io.Transport.xhr-polling}
   * @api public
   */

    function JSONPPolling (socket) {
        io.Transport['xhr-polling'].apply(this, arguments);

        this.index = io.j.length;

        var self = this;

        io.j.push(function (msg) {
            self._(msg);
        });
    };

    /**
   * Inherits from XHR polling transport.
   */

    io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);

    /**
   * Transport name
   *
   * @api public
   */

    JSONPPolling.prototype.name = 'jsonp-polling';

    /**
   * Posts a encoded message to the Socket.IO server using an iframe.
   * The iframe is used because script tags can create POST based requests.
   * The iframe is positioned outside of the view so the user does not
   * notice it's existence.
   *
   * @param {String} data A encoded message.
   * @api private
   */

    JSONPPolling.prototype.post = function (data) {
        var self = this
        , query = io.util.query(
            this.socket.options.query
            , 't='+ (+new Date) + '&i=' + this.index
            );

        if (!this.form) {
            var form = document.createElement('form')
            , area = document.createElement('textarea')
            , id = this.iframeId = 'socketio_iframe_' + this.index
            , iframe;

            form.className = 'socketio';
            form.style.position = 'absolute';
            form.style.top = '-1000px';
            form.style.left = '-1000px';
            form.target = id;
            form.method = 'POST';
            form.setAttribute('accept-charset', 'utf-8');
            area.name = 'd';
            form.appendChild(area);
            document.body.appendChild(form);

            this.form = form;
            this.area = area;
        }

        this.form.action = this.prepareUrl() + query;

        function complete () {
            initIframe();
            self.socket.setBuffer(false);
        };

        function initIframe () {
            if (self.iframe) {
                self.form.removeChild(self.iframe);
            }

            try {
                // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
                iframe = document.createElement('<iframe name="'+ self.iframeId +'">');
            } catch (e) {
                iframe = document.createElement('iframe');
                iframe.name = self.iframeId;
            }

            iframe.id = self.iframeId;

            self.form.appendChild(iframe);
            self.iframe = iframe;
        };

        initIframe();

        // we temporarily stringify until we figure out how to prevent
        // browsers from turning `\n` into `\r\n` in form inputs
        this.area.value = io.JSON.stringify(data);

        try {
            this.form.submit();
        } catch(e) {}

        if (this.iframe.attachEvent) {
            iframe.onreadystatechange = function () {
                if (self.iframe.readyState == 'complete') {
                    complete();
                }
            };
        } else {
            this.iframe.onload = complete;
        }

        this.socket.setBuffer(true);
    };
  
    /**
   * Creates a new JSONP poll that can be used to listen
   * for messages from the Socket.IO server.
   *
   * @api private
   */

    JSONPPolling.prototype.get = function () {
        var self = this
        , script = document.createElement('script')
        , query = io.util.query(
            this.socket.options.query
            , 't='+ (+new Date) + '&i=' + this.index
            );

        if (this.script) {
            this.script.parentNode.removeChild(this.script);
            this.script = null;
        }

        script.async = true;
        script.src = this.prepareUrl() + query;
        script.onerror = function () {
            self.onClose();
        };

        var insertAt = document.getElementsByTagName('script')[0]
        insertAt.parentNode.insertBefore(script, insertAt);
        this.script = script;

        if (indicator) {
            setTimeout(function () {
                var iframe = document.createElement('iframe');
                document.body.appendChild(iframe);
                document.body.removeChild(iframe);
            }, 100);
        }
    };

    /**
   * Callback function for the incoming message stream from the Socket.IO server.
   *
   * @param {String} data The message
   * @api private
   */

    JSONPPolling.prototype._ = function (msg) {
        this.onData(msg);
        if (this.open) {
            this.get();
        }
        return this;
    };

    /**
   * The indicator hack only works after onload
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

    JSONPPolling.prototype.ready = function (socket, fn) {
        var self = this;
        if (!indicator) return fn.call(this);

        io.util.load(function () {
            fn.call(self);
        });
    };

    /**
   * Checks if browser supports this transport.
   *
   * @return {Boolean}
   * @api public
   */

    JSONPPolling.check = function () {
        return 'document' in global;
    };

    /**
   * Check if cross domain requests are supported
   *
   * @returns {Boolean}
   * @api public
   */

    JSONPPolling.xdomainCheck = function () {
        return true;
    };

    /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

    io.transports.push('jsonp-polling');

})(
    'undefined' != typeof io ? io.Transport : module.exports
    , 'undefined' != typeof io ? io : module.parent.exports
    , this
    );
